Dog biscuit



FIG. 1 is a front elevation view of a dog biscuit;

FIG. 2 is a back elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation view thereof; and,

FIG. 6 is a right side elevation view thereof.

The broken lines in FIGS. 1 and 3-6 illustrate portions of the dog biscuit that form no part of the claimed design. 

CLAIM The ornamental design for a dog biscuit, as shown and described. 